â¢ 3000 BC Sumerians use asphalt as an adhesive; Eqyptians use pitch to grease. chariot wheels; Mesopotamians use bitumen to seal boats. â¢ 600 BC Confucius writes about drilling a 100â gas well and using bamboo for pipes. â¢ 1500 AD Chinese dig oil wells >2000â deep. â¢ 1847 First ârock oilâ refinery in England. â¢ 1849 Canada distills kerosene from crude oil.
Donating Blood. Who Can Donate? Anyone who is in good health, is at least 18 years old (persons 16 or 17 years old may donate with a Blood Program permission slip signed by a parent or guardian), and weighs at least 114 pounds may donate blood every 56 days.
Any donor, who is healthy, fit and not suffering from any transmittable diseases can donate blood. Donor must be 18 -60 years age and having a minimum weight of 50Kg can donate blood. Donorâs Hemoglobin level is 12.5% minimum. A donor can again donate blood after 3 months of your last donation of blood. Pulse rate must be between 50 to 100mm without any irregularities. BP Diastolic 50 to 100 mm Hg and Systolic 100 to 180 mm Hg.